编译kaldi扩展工具irstlm

版本：Fedora release 25 (Twenty Five)

gcc version 6.3.1 20161221 (Red Hat 6.3.1-1) (GCC)

为什么单独拿出来这个说呢？

因为从GCC 6 开始，gcc已经提供cstdlib，这时如果在再使用-isystem，就会报错

In file included from /usr/include/c++/6.3.1/ext/string_conversions.h:41:0,           

     from /usr/include/c++/6.3.1/bits/basic_string.h:5402,

                from /usr/include/c++/6.3.1/string:52, 

               from /usr/include/c++/6.3.1/bits/locale_classes.h:40,    

            from /usr/include/c++/6.3.1/bits/ios_base.h:41,  

              from /usr/include/c++/6.3.1/iomanip:40,     

           from dictionary.cpp:25:/usr/include/c++/6.3.1/cstdlib:75:25: fatal error: stdlib.h: 

No such file or directory #include_next^

需要修改

irstlm/src/Makefile.am

和

irstlm/src/Makefile.in

把里面的

AM_CXXFLAGS = -static -isystem/usr/include -W -Wall -ffor-scope -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES $(BOOST_CPPFLAGS) -DMYCODESIZE=3

修改为：

AM_CXXFLAGS = -static -W -Wall -ffor-scope -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES $(BOOST_CPPFLAGS) -DMYCODESIZE=3

这样再运行脚本 extras/install_irstlm.sh，就可以顺利编译了。